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  Home > Air Measurement > Humidity/Temperature >

Extech RH520A Humidity and Temperature Digital Chart Recorder
RH520A Humidity and Temperature Digital Chart Recorder
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Our Price: $399.99
Sale Price: $329.99
You save $70.00!

Availability:: Usually Ships in 3 to 5 Business Days
Product Code: EXT-RH520A

NIST Certificate (Adds 7-10 days):



  • Simultaneous numerical and graphical display of Humidity and Temperature readings, plus Time and Date
  • Measures Humidity (10 to 95%RH) and Temperature (-20.0F to 140.0F) plus calculates Dew Point
  • Large dual graphical LCD displays with adjustable vertical and horizontal TAC resolution
  • Internal memory records up to 49,000 data points and can be transferred to a PC via RS-232 serial port for further data analysis - cable and software included
  • LCD indicates percentage of memory remaining
  • Replaceable probe does not require recalibration
  • Detachable probe extends up to 1 meter for measurements in closed environments
  • Audible and visual alarm with Hi/Low setpoints
  • Download, analyze, and store data using Windows 95/98/2000/NT/ME/XP Compatible Software (included)
  • Output socket used with optional external alarm module
  • Scroll the cursor to display selected data recorded
  • Desk or wall mount
  • Complete with built-in stand, detachable probe with 3ft (1m) cable, RS232 cable, software, 110VAC adaptor and 3 AA batteries Applications
  • Monitor and record Laboratory or clean Room temperature and humidity history
  • Record process conditions
  • Generate warning when conditions are outside required limits
  • Monitor controlled environment areas such as freezers, storage areas and other critical areas
  • Store humidity and temperature historical data for report generation
  • Wall mounted for storage and easy viewing of Temperature and Humidity trends with date/time stamp
  • Desk mount configuration with easy to program swivel arm control panel plus probe with remote cable for reaching into ducts and humidity chambers


  • Relative Humidity Range: 10.0 to 95.0%
  • Temperature Range: -20.0 to 140.0F (-28.0 to 60.0C)
  • Accuracy: 3% Relative Humidity; 1.8F/1C
  • Dimensions: 5 x 7.7 x 0.9" (129x195x22mm)
  • Weight: 12.6oz (357g)
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Air Measurement > Humidity/Temperature
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900 W. Main Street
Ephrata, PA 17522
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